Scientific Works published by Longmans, Green, <S^ Co. 1 1 



[ : ' 7 '■ ■ 



UNWIN— The Elements of Machine Design. By W. Haw- 

 thorne Unwin, F.RS., Professor of Engineering at the Central 

 Institute of the City and Guilds of London Institute. Part I. General 

 Principles, Fastenings and Transmissive Machinery. With 304 Dia- 

 grams, &c. Crown 8vo. ^&, Part II. Chiefly on Engine Details. 

 With 174 Woodcuts. Crown 8vo. 4s. M. 



ARCHITECTURE. 



GWILT — An Encyclopaedia of Architecture. By Joseph Gwilt^ 

 F.S.A. Illustrated with more than 1100 Engravings on Wood. 

 Revised (1888), with Alterations and Considera'ble -Additions, by 

 Wyatt Papwor^h. Svo. ^2 12s. %d, 



MITCHELL— The Stepping-Stone to Architecture : explaining 

 in simple lanfjuage the principles and j>rogres3 of Architecture from 

 the earliest times. By Thomas Mitchell. With 22 Plates and 49 

 Woodcuts. ISmo. \s. sewed. 



ASTRONOMY AND NAVIGATION- 

 BALL— Elements of Astronomy. With 136 Eigures and Diagrams. 

 By Sir Robert S. Ball, LL.D., F.R.S. With 136 Woodcuts. Fcp. 

 Svo. %&. 



%* The reader of this volume is expected to possess such knowledge of mathematics 

 as may be gained by studying the Elements of Euclid and Algebra, together with a Aidi- 

 mentary acquaintance with the geometry of Planes and Spheres. The book contains 

 chapters on the Instruments used in Astronomical Observations, the Earth, the Diurnal 

 Motion of the Heavens, the Sun, Motion of the Earth around the Sun, 'the Moon, the 

 Planets, Comets and Meteors, Universal Gravitation, Stars and Nebulte, the Structure of 

 the Sun, Astronomical Constants, &c., &c. 



^ — ■■ — A Glass-Book of Astronomy. By Sir Robert S. Ball, 

 LL.D., F.RS. With 41 Diagrams. Fcp. Svo. Is. 6d. 



BCEDDIGKER— The Milky ^V'ay. From the North Pole to 10' of 

 South Declination. Drawn at the Earl of Rosse's Observatory at Birr 

 Castle. By Otto Bceddicker. With Descriptive Letterpress. 4 

 Plates, size 18 in. by 23 in. in portfolio, 30s. 



BRINKLBY'S Astronomy. Re-edited and Revised by J . W. Stubbs, 

 D.D., and, F. Brunnow, Ph.D. With 49 Diagrams. Crown Svo. 6s. 



CLBRKB— The System of the Stars. By Agnes M. Clerke, 

 Author of * A History of Astronomy during the Nineteenth Century '. 

 With 6 Plates and numerous Illustrations. Svo. 21s. 



HBRSCHEL -Outlines of Astronomy. By Sir John F. W. 

 Herschel, Bart., K.H., &c., Member of the Institute of France. 

 With 9 Plates and numerous Diagrams. Square crown Svo. 12s. 



MARTIN— Navigation and Nautical Astronomy. Compiled 

 by Staff-Commander W. R. Martin, R.N., Instructor in Surveying,, 

 'Navigation and Compass Adjustment ; Lekurer on Meteorology at 

 the Royal Naval College, Greenwich. Sanctioned for use in the 

 Royal Navy by the Lords Commissioners of the Admiralty. New 

 Edition. Royal Svo. 18s. 



